A cornucopia of technology will be jostling for attention at the annual consumer electronics extravaganza being held in Las Vegas this week. Some 2,500 exhibitors and 130,000 people are expected to flock to the Consumer Electronics Show to catch up with the latest products and software. The keynote speakers not only include the bosses of Microsoft and Sony, but also Web titans Google and Yahoo. The line-up reflects the shift towards digital media and an online lifestyle.